Pneumatic control system and parts therefor or the like

ABSTRACT

This disclosure relates to a laundry machine wherein the rotating laundry confining drum or tub is operatively interconnected to a vacuum pump to cause continuous operation of the vacuum pump during the entire movement of the confining means so as to provide a source of vacuum for controlling vacuum operated actuators of the apparatus. In addition, a pneumatically operated timer controlling the &#39;&#39;&#39;&#39;on-off&#39;&#39;&#39;&#39; operation of the laundry machine is repetitively actuated and deactuated by the movement of the laundry confining means.

United States Patent Scott July 25, 1972 [541 PNEUMATIC CONTROL SYSTEMAND [56] References Cited PARTS THEREFOR OR THE LIKE FOREIGN PATENTS ORAPPLICATIONS [72] Inventor: Douglas R. Scott, Elkhart, Ind. 61 1,38610/1960 Italy .417/306 [1 Assigneez R b m Controls p y, Great Bl'ltall'lRichmond Primary Examiner-Robert M. Walker [22] Filed: Aug. 26, 1970Attorney-Auzville Jackson, Jr., Robert L. Marben and Candor, Candor 8:Tassone [2| 1 Appl. No.: 67,208

57 ABSTRACT Related US. Application Data This disclosure relates to alaundry machine wherein the rotating laundry confining drum or tub isoperatively intercon- [62] Dlvlslon of 1968 nected to a vacuum pump tocause continuous operation of 3,550,404" the vacuum pump during theentire movement of the confining means so as to provide a source ofvacuum for controlling vacuum operated actuators of the apparatus. Inaddition, a [52] U.S. Cl ..4l7/306 e mati ally o erated timercontrolling the on-off" opera- [5]] ..F04b 49/00 tion of the laundrymachine is repetitively actuated and deac- [58] Field of Search..417/306, 503 tuated by the movement of the laundry confining means.

5 Claims, 5 Drawing Figures rmmzmzs m2 3.679.330

SHEET 2 0F 2 IOO 94 m 98 w INVENTOR. DOUGLAS R. SCOTT M,@A17MM HISATTORNEYS PNEUMATIC CONTROL SYSTEM AND PARTS THEREFOR OR THE LIKE Thisapplication is a divisional patent application of its copending parentapplication, Ser. No. 776,224, filed Nov. 15, 1968, now U.S. Pat. No.3,550,404 and is assigned to the same assignee to whom the parentapplication is assigned.

This invention relates to a pneumatic control system as well as to animproved pneumatic pump and pneumatically operated timer means for sucha control system or the like.

It is well known that a laundry apparatus or the like can have the cycleof operation thereof controlled by pneumatically operated actuatorsoperated in a predetermined sequence by a timer driven program means,the pneumatic source for such a control system being provided by avacuum pump or the like and the period of operation of the apparatusbeing controlled by the electrical timer motor or the like.

One of the features of this invention is to provide such a pneumaticallycontrolled apparatus wherein the vacuum source for the control system ofthe apparatus is operated directly from the continuous movement of aworking part of the apparatus.

Another feature of this invention is to provide a pneumatically operatedtimer means for controlling the on-ofl cycle of operation of theapparatus, the pneumatically operated timer means being controlled bythe continuous movement of a working part of the apparatus.

In particular, the embodiment of this invention hereinafter illustratedand described includes a rotatable laundry receiving drum or tub of theapparatus which has cam means for operating a rocker am in a repetitivemanner with the rocker arm controlling the pumping operation of a vacuumpump to provide the pneumatic source for the control system. Inaddition, the repetitive rocking motion of the rocker arm controls avalve member disposed in fluid communication with the pneumaticallyoperated timer means so as to repetitively and effectively interconnectand disconnect the pneumatically operated timer to and from the vacuumsource so as to cause a movable timer member to be advanced through theentire cycle of operation thereof with the movable timer membercontrolling the on-off operation of the apparatus.

Accordingly, it is an object of this invention to provide an improvedpneumatic control system having one or more of the novel features setforth above or hereinafter shown or described. 7

Another object of this invention is to provide an improved pneumaticpumping arrangement for such a control system or the like.

Another object of this invention is to provide an improved pneumaticallyoperated timer means for such a control system or the like.

Other objects, uses and advantages of this invention are apparent from areading of this description which proceeds with reference to theaccompanying drawings forming a part thereof and wherein:

FIG. 1 is a schematic view, partially in cross section, illustrating theimproved. control system of this invention.

FIG. 2 is a fragmentary perspective view, partially in cross section,illustrating the improved pneumatically operated timer means of thisinvention.

FIG. 3 is a fragmentary cross-sectional view taken substantially on line3-3 of FIG. 2.

FIG. 4 is a fragmentary, enlarged side view of a part of the timer meansof FIG. 2 and illustrates the same in one of its operating positions.

FIG. 5 is a view similar to FIG. 4 and illustrates the timer means inanother operating position thereof.

While the various features of this invention are hereinafter describedand illustrated as being particularly adaptable for controlling theoperation of a laundry apparatus, it is to be understood that thevarious features of this invention can be utilized singly or in anycombination thereof to provide control means for other types ofapparatus as desired.

Therefore, this invention is not to be limited to only the embodimentillustrated in the drawings, because the drawings are merely utilized toillustrate one of the wide variety of uses of this invention.

Referring now to FIG. 1, a laundry apparatus of this invention isgenerally indicated by the reference numeral 10 and comprises arotatable laundry receiving drum or tub 11 adapted to be drivencontinuously in the counterclockwise direction of the arrow of FIG. 1 aslong as an electrical motor 12 is energized by being placed across powersource leads L and L. by an electrical switch 13 that is controlled by atimer means of this invention and schematically illustrated andgenerally indicated by the reference numeral 14in FIG. I with thespecific details of the timer means 14 being illustrated in FIGS. 2-6and hereinafter described.

The laundry confining means 11 has one or more cam elements 15 formed onthe outer periphery thereof for causing repetitive rocking of a rockerarm 16 being pivotally mounted to suitable stationary frame means 17 ofthe apparatus 10 by a pivot pin 18. The rocker arm 16 has opposed ends18 and 19 with the end 19 being continuously urged toward the outerperipheral surface 20 of the confining means 11 by a spring means 21. Inthis manner, the spring means 21 causes the end 19 of therocker arm 16to follow the contour of the outer peripheral surface 20 of the drum 1 1so that when the drum 11 is rotating in the counterclockwise directionby the motor means 12, the cam means 15 on the drum 11 will causerepetitive rocking of the rocker arm 16 to perform a dual function in amanner hereinafter described.

The pneumatic control system for the laundry apparatus 10 is generallyindicated by the reference numeral 22 in FIG. I and includes thepneumatically operated timer means 14 as well as a vacuum pump meansthat is generally indicated by the reference numeral 23 and will now bedescribed.

As illustrated in FIG. 1, the frame means 17 includes a plate-likeportion 24 having an upper surface 25 and a lower surface 26 interruptedby three bore means 27, 28 and 29 passing completely through theplate-like portion 24. A tubular portion 30 extends upwardly from theupper end 25 of the plate-like portion 24 outboard of the bores 27, 28and 29 and has an upper end 31 secured to an outer peripheral means 32of a flexible diaphragm 33 in a snap fit, sealed relation whereby theflexible diaphragm 33 cooperates with the tubular portion 30 to define achamber 34 between the diaphragm 33 and the upper surface 25 of theplate-like portion 24. The flexible diaphragm 33 has its inner periphery35 secured to a disc-like member 36 that carries an actuating post'37that is pivotally mounted to the end 18 of the rocker am 16 by a pivotpin 38.

The bore 27 in the plate-like member 24 includes a valve memberreceiving chamber 39 having a valve seat 40 at the upper side thereofand a plurality of spaced upwardly directed abutments 41 at the lowerend thereof. A valve member 42 is disposed in the valve chamber 39 andis movable between the valve seat 40 and the abutments 41 in a mannerhereinafter described.

Similarly, the bore 29 in the plate-like member 24 has a valve memberreceiving chamber 43 formed therein except that a valve seat 44 isdisposed at the lower end thereof and a plurality of spaced abutmentmeans 45 are provided at the upper end thereof and project downwardly. Avalve member .46 is disposed in the chamber 43 and is movable betweenthe valve seat 44 and abutment means 45 in a manner hereinafterdescribed.

The bore means 28 in a plate-like member 24 is internally threaded at 47to receive an externally threaded adjusting member 48. A valve seat 49is provided in the bore 28 and a ball valve member 50 is continuouslyurged against the seat 49 by a compression spring 51 disposed betweenthe threaded adjusting member 48 and the ball 50, the bore means 28having a porous filtering material 52 disposed therein below the valveseat 49 for a purpose hereinafter described. 1

The bore means 29 of the pumping means 23 is fluidly interconnected to aconduit 53 that leads to an accumulator 54. The accumulator 54, in turn,is interconnected to a conduit 55 which can lead to a plurality ofpneumatically operated actuators (not shown) for controlling variousparts of the apparatus in a manner well known in the art.

.I'he conduit 53 is also fluidly interconnected to a conduit 56 whichleads to the pneumatically operated timer means 14 as will be apparenthereinafter, the conduit 56 having a restriction 57 therein in advanceof a branch conduit 58 fluidly interconnected to the conduit 56intermediate the restrictor 57 and timer. means 14.

The conduit 58 is fluidly interconnected to a chamber defin-' ing means59 formed in the frame means 17 of the apparatus 10 and having a valveseat 60 at the upper end thereof that leads to the atmosphere. by apassage means 61 passing through the valve seat 60. A valve member 62 isdisposed in the chamber-59 and is normally urged into seating engagementwith the valve seat 60 by a compression spring 63. The valve member 62has a valve stem 64 projecting therefrom and out through the passage 6lto be engageable by the end 19 of the rocker arm 16. H

In particular, as the drum 11 is rotating in a counterclockwisedirection in, FIG. 1, the'cam means are so constructed and arranged thatas the cam means 15 cams against the end 19 of the rocker arm 16 tocause the end 19 to move downwardly in FIG. 1, the end 19 of the rockerarm 16 engages against the valve stem 64to move the valve stem 64vertically downwardly and thereby open the valve seat 60 until the cammeans 15 passes beyond the end 19 of the rocker arm 16'so that thespring means 21 can return the rocker arm 16 to the position illustratedin FIG. 1 and permit the valve member 62 to again seat against the valveseat 60 under the force of the compression spring 63 for a purposehereinafier described.

The timing means 14 of FIG. 1' is illustrated in detail in FIGS. 2-5 andwill now be described.

As illustrated in FIG. 2, the timing means 14 includes a stationaryframe means 65 having upper and lower plate means 66 and 67 being heldin spaced relation by side wall means 68 to define a chamber 69therebetweenthat receives a rotatable disc-like member 70 mounted forrotation in thechamber 69 by a shaft means 71 interconnected thereto andpassing through .a bore 72 in the lowerplate member67. The rotatabledisc 70 has a ring gear means 73 on the outer periphery thereof and acam track 74 on the underside thereof adapted to engage against aplunger 75 .of the previously described electrical switch 13 that iscarried on the plate means 67. As long as the cam track 74 isengagingthe plunger 75 of the electrical switch 13,the plunger 75 is held in aposition to complete a circuit through the switch 13 so that the powersource leads L' and I. are placed acrossthe main motor 12 whereby themain motor 12 is energized and continuously drives the laundry confiningmeans 11. However, when a portion of the camtrack 74 ceases to engageagainst the plunger 75, the plunger 75 moves outwardly to disconnect thepower source leads L and L from the electrical motor 12 to terminate theoperation of the apparatus 10.

Thus, a suitable selector knob can be mounted on the shaft .71 of therotatable disc 70 so that the housewife or the like can manually set thedisc 70 in any desired starting position thereof whereby the timingmeans 14 of this invention will continue to operate for the selectedperiod of time as will be apparent hereinafter to continuously rotatethe laundry confining means 11 until an end of the cam track 74 reachesthe plunger 75 of the electrical switch 13 to terminate not only theoperation of the electrical motor 12, but also to terminate theoperation of the control system 22 of this invention as will be apparenthereinafter. I

A pneumatically operated actuator 77 is carried by the frame means 65and comprises a flexible diaphragm 78 having its outer periphery 79 heldagainst the top plate 66 by a suitable housing member 80 secured to thetop plate 66 in any suitable manner. The inner periphery 81 of theflexible diaphragm 78 is interconnected to an actuating post 82 thatpasses out through the opening 83 in the housing member 80 to bepivotally interconnected to one end 84 of a rocker arm 85 by a pivot pin86. The flexible diaphragm 78 cooperates with the top surface of theupper plate 66 of the frame means 65 to define a chamber 87 therebetweenwhich is disposed in fluid communication with a passage means 88 formedin the top plate 66 and being fluidly interconnected to the right handend of the conduit 56 of FIG. 1 by a tubular nipple means 89. Acompression spring 90 is disposed in the chamber 87 to tend to urge theflexible diaphragm 78 to its deactuated position illustrated in FIG. 2.7

Another housing member 91 is carried by the frame means 65 andcooperates with the lower plate 67 to define a chamber 92 therebetweenthat rotatably receives a first cylindrical disc 93 having a shaft 94interconnected thereto and having its lower end received in a bore 95 inthe plate 67, the shaft 94 having its upper end 96 being received in asuitable bore 97 in the housing member 91 so as to rotatably mount thecylindrical member 93 to the housing means 65. The shaft 94 carries apinion gear 98 which is disposed in meshingrelation with the ring gearmeans 73 of the rotatable timer disc 70 for a purpose hereinafterdescribed.

An outer annular member 99 is about the cylindrical member 93 and isclutched thereto by overrun vclutch means comprising a plurality ofballs 100 being received in described by the rocker arm 85, thecounterclockwise rotating 7 annular member 99 causes the balls 100 toclutch into the flat surfaces 102 of the cylindrical member 93 and carrythe same therewith in a counterclockwise direction whereby the piniongear 98 also moving in a counterclockwise direction will cause clockwisemovement of the timer disc 70 because of the meshing relation betweenthe pinion gear 98 and the ring gear means 73.

However, should the housewife or the like rotate the timer disc .70 in acounterclockwise. direction through the shah means 71 thereof toposition the timer disc 70 at a desired starting position thereof, suchcounterclockwise movement will cause clockwise movement of thecylindrical member 93 and non-movement of the outer annular member 99because the clutch'balls 100 will not be disposed in wedging relativerelation between the clockwise movement cylindrical member 93 and thecylindrical side wall means member 99. i v

The annular member 99 has a slot 105 formed in the outer peripherythereof which cooperates with the rocker arm 85 in a manner now to bedescribed.

The rocker arm 85 has an intermediate portion thereof pivotally mountedto the housing member 91 by a pivot pin 106. Theleft hand end 107 of therocker arm 85 defines a pointed tongue 108 that is received in the slot105 of the annular member 99.

When a vacuum is being imposed in the chamber 87 of the actuator 77 ofthe timing means 14 of this invention, the resulting pressuredifi'ercntial being created across the diaphragm 78 moves the diaphragm78 downwardly in opposition to the force of the compression spring 90whereby the rockerarm 85 has the end 84 thereof moved downwardly and theend 107 thereof moved upwardly to the position illustrated in FIG. 4.Thus, it can be-seen that the pointed tongue 108 is positioned againstthe right hand edge 105A of the slot 105 of the position illustrated inFIG. 2 whereby the rocker arm 85 is moved in such a manner that the lefthand end 107 thereof is moved downwardly from the position illustratedin FIG. 4 to a the position illustrated in FIG. 5 whereby the tongue 108acts against the right hand side 105A of the slot 105 to cam the an- 104of the annular nular member 99 in a counterclockwise direction from theposition illustrated in FIG. 4 to the position illustrated in FIG. 5. Inthis manner, the clutch balls 100 cause the member 93 to be indexed oneincrement in a counterclockwise direction, and, thus, cause the timerdisc 70 to be advanced one increment in a clockwise direction.

With the rocker arm 85 now disposed in the position illustrated in FIG.5, subsequent actuation of the actuator 77 by the interconnection of thevacuum source to the chamber 87 thereof ina manner hereinafter describedcauses the rocker arm 85 to have the end 84 thereof pulled downwardlyand the end 107 thereof moved upwardly from the position illustrated inFIG. 5 back to the position illustrated in FIG. 4. However, as thetongue 108 is being moved upwardly against the left hand side 105B ofthe slot 105, the tongue 108 causes the annular member 99 to be moved ina clockwise direction. However, the member 93 is not moved by theclockwise moving annular member 99 because the clutch balls 100 do notclutch with the member 93 when the annular member 99 is moved in aclockwise direction whereby the member 93 and timer disc 70 remainstationary during upward movement of the left hand end 107 of the rockerarm 85.

Thus, it can be seen that upon repetitive actuation and deactuation ofthe actuator 77, the rocker arm 85 will be rocked back and forth in sucha manner that the tongue 108 thereof causes the annular member 99 to bedriven in an alternating clockwise and counterclockwise direction inFIG. 2 and, thus, through the pinion gear 98 and ring gear means 73,will cause increment movement of the timer disc 70 in a clockwisedirection during the clockwise movement of the annular member 99.

Therefore, it can be seen that both the vacuum pump 23 and pneumaticallyoperated timer means 14 of this invention can be formed from relativelyfew parts in a simple and effective manner to function to control theapparatus in a manner now to be described.

When the housewife or the like desires to operate the aparatus 10, thehousewife sets the timer disc 70 by means of the shaft means 71 in anydesired starting position thereof from the stopping position of the disc70 whereby in the selected starting position of the disc 70, the camtrack 74 thereof has moved the plunger 75 of the switch 13 inwardly tocomplete the circuit therethrough so that the main motor 12 is energizedand will remain energized until the timer disc 70 is subsequentlyrotated from its selected starting position to its end of cycle positionwhere the cam track 74 terminates so as to permit the plunger 75 of theelectrical switch 13 to move outwardly and disconnect the power source Land I. from electric motor 12.

Since the electric motor 12 is now operating to rotate the laundryreceiving drum 11 in a counterclockwise direction as illustrated in FIG.1, the cam means 15 thereof cause repetitive rocking of the rocker arm16 in the manner previously described whereby an initial upward movementof the end 18 of the rocker arm 16 carries the flexible diaphragm 33 ofthe vacuum pump 23 therewith so that the volumetric capacity of thechamber 34 increases and causes a pressure diflerential across the valvemember 42 in the bore 27 in such a manner that the valve member 42 isheld against the seat 40 so as to prevent any air from flowing into theincreasing chamber 34 through the bore 27.

During the upward movement of the diaphragm 33 by the rocker arm 16, theincreasing chamber 34 causes a pressure differential across the valvemember 46 to move the valve member 46 away from the valve seat 44 andagainst the abutment means 45 so that the conduit means 53, 56 andaccumulator 54 has the air therein drawn into the increasing chamber 34ofthe pump 23.

Subsequently, the return of the rocker arm 16 back to the positionillustrated in FIG. 1 causes the diaphragm 33 to move downwardly andthereby decrease the volumetric capacity of the chamber 34 so that theair being compressed therein causes the valve member 46 to close againstthe valve seat 44 and the valve member 42 to move away from the valveseat 40 and against the abutment means 41 in the manner illustrated inFIG. 1 so that the air being compressed in the decreasing chamber 34will pass out through the open valve seat 40 and passage means 27 to theatmosphere.

Therefore, it can be seen that subsequent upward and downward movementof the diaphragm 43 by the repetitive action of the cam means 15 of thelaundry drum 1 1 against the rocker arm 16 causes a pumping action toevacuate the accumulator 54 and conduit means 53 and 56 so that theresulting vacuum source can be utilized to operate various vacuumoperated actuators interconnected to the conduit means 55.

In addition, the evacuation taking place in the conduit 56 also, throughthe restrictor 57, causes evacuation of the conduit 56 to the right ofrestrictor 56 in FIG. 1 as well as an evacuation in the conduit 58.

The evacuation in the conduit 56 to the right of the restrictor 57inFIG. 1 causes an evacuation of the chamber 87 of the actuator 77 of thetimer means 14 so as to cause the diaphragm 78 to be pulled verticallydownwardly in FIG. 2 and move the rocker arm 85 to the positionillustrated in FIG. 4.

However, when the rocker arm 16 in FIG. 1 has the end 19 thereof moveddownwardly to provide an intake stroke of the vacuum pump 23 in themanner previously described by the cam means 15 acting against the end19 of the rocker arm 16, the end 19 of the rocker arm 16 engages againstthe plunger 64 of the valve member 62 to move the valve membertemporarily away from the valve seat 60 so that air can return into theconduit 58 and into the chamber 87 of the actuator 77 to deactuate thesame to the position illustrated in FIG. 2 and thereby provide anincrement of movement of the annular member 99 in a counterclockwisedirection as illustrated in FIG. 5 so that the timer disc is nowadvanced one increment in a clockwise direction of FIG. 2 from thepreviously described set starting point thereof toward its end of cycleposition.

The temporary return of air into the conduit 58 by the open valve member62 to deactuate the actuator 77 of the timer means 14 does not effectthe vacuum created in the accumulator 54 by the continuously operatingvacuum pump 23 because of the restrictor means 57 in the conduit 56.

Subsequently, when the cam means 15 passes beyond the rocker arm 16 tocause the rocker arm 16 to move back to the position illustrated in FIG.1 to provide an exhaust stroke of the vacuum pump 23, the valve member62 returns to its closed position against the valve seat 60 so that theactuator 77 can again be evacuated to return the rocker arm 85 to theposition illustrated in FIG. 4.

Therefore, it can be seen that not only does the cam means 15 of thecontinuously moving laundry drum 11 cause a pumping operation of thevacuum pump 23, but also the cam means 15 causes a repetitive,efi'ective actuation and deactuation of the timer actuator 77 wherebythe timer disc 70 is repetitively advanced in a clockwise directionuntil the end of the cam 74 thereof reaches the plunger of theelectrical switch 13 at which time the electrical switch 13 is opened soas to terminate the operation of the motor 12. The termination of theoperation of the motor 12, of course, stops the rotation of the drum 11and, thereby, stops the operation of the vacuum pump 23 and thepneumatically operated timer means 14 until the housewife or the likeagain sets the timer means 14 in a desired starting position thereof.

During the aforementioned operation of the vacuum pump 23 by thecontinuously moving laundry drum 11, the ball valve 50in the bore means28 acts as a vacuum regulator so that too great of a vacuum will not beimposed on the accumulator 54 and the interconnecting conduits from adesired vacuum value.

In particular, as the degree of vacuum increases in the chamber 34 ofthe vacuum pump 23, a pressure differential is created across the ballvalve 50 and when that pressure differential exceeds the force of thecompression spring 51 tending to maintain the ball valve 50 against thevalve seat 49, the ball valve 50 is moved upwardly so that air can enterthe chamber 34 through the porous filtering material 52 and opened valveseat 49 and thereby prevent too great of a vacuum value being imposed onthe accumulator 54. Thus, by

merely setting the threaded relationship of the adjusting member 48relative to the plate 24, the force of the compres sion spring 51 can beadjusted so as to cause the vacuum pump 23 to maintain a particularvacuum value in the accumulator 54 during the operation of the vacuumpump 23.

Thus, it can be seen that this invention not only provides an improvedpneumatic control system for an apparatus or the like, but also thisinvention provides an improved pneumatic pumping means as well as animproved pneumatically operated timer means for such a control system orthe like.

What is claimed is:

l. A pneumatic pump comprising frame means having a flat wall providedwith opposed surfaces, said frame means having a tubular wall extendingfrom one of said opposed surfaces, a flexible diaphragm carried on thefree end of said tubular wall of said frame means and cooperating withsaid one surface to define a chamber therebetween, said frame meanshaving three parallel bores passing through said opposed surfaces ofsaid flat wall thereof and leading to said chamber, an input valve meansdisposed in one of said bores, an output valve means disposed in anotherof said bores, and a vacuum regulator disposed in the remaining bore.

2. A pneumatic pump as set forth in claim 1 wherein said vacuumregulator comprises a spring biased ball valve for opening and closing avalve seat in said remaining bore.

3. A pneumatic pump as set forth in claim 2 wherein an adjusting memberis carried in said remaining bore to adjust the 5. A pneumatic pump asset forth in claim 4 wherein the bore for said vacuum regulator isdisposed intermediate the other two bores.

II i i

1. A pneumatic pump comprising frame means having a flat wall providedwith opposed surfaces, said frame means having a tubular wall extendingfrom one of said opposed surfaces, a flexible diaphragm carried on thefree end of said tubular wall of said frame means and cooperating withsaid one surface to define a chamber therebetween, said frame meanshaving three parallel bores passing through said opposed surfaces ofsaid flat wall thereof and leading to said chamber, an input valve meansdisposed in one of said bores, an output valve means disposed in anotherof said bores, and a vacuum regulator disposed in the remaining bore. 2.A pneumatic pump as set forth in claim 1 wherein said vacuum regulatorcomprises a spring biased ball valve for opening and closing a valveseat in said remaining bore.
 3. A pneumatic pump as set forth in claim 2wherein an adjusting member is carried in said remaining bore to adjustthe force of said spring biased ball valve toward said valve seat.
 4. Apneumatic pump as set forth in claim 1 wherein said three bores are inaligned relation with each other.
 5. A pneumatic pump as set forth inclaim 4 wherein the bore for said vacuum regulator is disposedintermediate the other two bores.